The altar itself looks like it came from a movie. It's a heavy slab of stone with grooves carved in it to gather blood, and metal rings that still hold pieces of decayed ropes. A skeleton is a perfectly fitting addition to this piece of furniture, but what makes me faintly nauseated is knowledge that this isn't some stage prop.
It was a real person, once. Now all that's left is a heap of dusty bones, connected by remnants of sinew and muscle. I spot a couple of bones lying on the floor nearby, so it must've been messy.
What I don't see anywhere is the skeleton's head.
Zeke moves towards the altar, the magical ball of light following his movements. The monster stops to hover over the skeleton, his face inscrutable.
"Here you see it—the centerpiece. The ring chanted their prayers and offered the sacrifice, but it didn't go as they planned, oh no… What you see in Willow Creek now are consequences of that fateful day, Maya."